*{
    margin: 0px;
    padding: 0px;
}
ul{
    list-style: none;
}
header{
    background-color:#212121 ;
    height: 75px;
    color: #b9bec0;
}
.header_main{
    width: 1000px;
    height: 75px;
    margin: 0px auto;
    display: flex;
    justify-content: space-between;
}
.logo ul{
    display: flex;
    line-height: 75px;
}
.logo li{
    margin-right: 30px;
}
.logo li:first-child{
    margin-top: 5px;
}

.other ul{
    display: flex;
    line-height: 75px;
}
.other li{
    margin-left: 30px;
}
.other li a{
    text-decoration: none;
    color: #b9bec0;
}
.other li:last-child{
    height: 75px;
    width: 40px;
    position: relative;
}
.other li:last-child section{
    margin-top: 15px;
    background-image: url(../img/head2.png);
    height: 40px;
    width: 40px;
    border-radius: 50%;
    display: inline-block;
}
.menu{
    line-height:46px;
    height: 168px;
    width: 150px;
    position: absolute;
    top: 75px;
    left: -65px;
    display: none;
    background-color: white;
}
.menu aside{
    text-align: center;
    height: 40px;
    width: 100%;
}
.other li:last-child:hover .menu{
    display: block;
}
.menu aside:hover{
    background-color: #81d867;
    color: white;
}
article{
    width: 100%;
    background-image: url(../img/bg.jpg);
}






/* 脚注 */
footer{
    height: 200px;
    width: 100%;
    background-color: #212121;
    color:#b9bec0 ;
}
.footer_main{
    width: 1000px;
    margin: auto;
    display: flex;
    justify-content: space-between;
}
.footer_left ul{
    display: flex;
    line-height: 60px;
}
.footer_left ul li{
    margin-right: 30px;
}
.footer_right_down ul{
    display: flex;
}
.footer_right_top{
    margin-top: 20px;
}
.footer_right_down ul li{
    margin-top: 30px;
    font-size: 30px;
    margin-right:30px ;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    color: white;
}
.footer_right_down ul li:nth-child(1){
    background-color: #d81f08;
}
.footer_right_down ul li:nth-child(2){
    background-color: #3aaf34;
}
.footer_right_down ul li:nth-child(3){
    background-color: #1571cf;
}
.footer_right_down ul li:nth-child(4){
    background-color: #43930d;
}